DIY Sand Battery Air Heaters! w/heat powered fans! no electricity needed! sand battery room heater!

Even running a small electric fan over this would be cheaper than running an electric heater,much cheaper.

I don't understand what I'm seeing here. How does sand, on its own with no external heating, heat itself up to 350°?

❤New subscriber from Oklahoma
I've been trying to find a good heat source for my tiny house (288sf) & this looks like a great solution!! Thanks!!😊

How does the sand stay hot?.

I use an electric oil radiator heater all winter here in Manitoba, Canada to keep my garage at 8 degrees Celsius or so throughout the winter. Ceiling and walls insulated. I put a stainless steel bucket full of sand on top of it. Last night, I was screwing with my sons frozen car battery and threw a breaker but didn't notice. The heater shut off. Today, I went back to the garage and it was only plus 2 Celsius. I'm glad to have had the sand battery to keep the temp above freezing.

Hello...where did you get these fans? Thank you.

how long does the heat last? Would salt be better than sand?

Amazing

Wow, great tip, thank u for sharing

Aside from some fans being aesthetically more pleasing than others, Are all thermoelectric stove fans the same?

I'd like to see the temperature readings from the fan output. Is the heated air coming directly from the hot sand or from the metal structure surfaces? Is the metal steel or aluminum?

Where can we buy those electric fans made to use with sand batteries?

Great video and Information thanks sharing! Also do you mind sharing the brand or where you got your fans?

Once you heat it up, how long does it last

Thats great, now use liquid sodium.

I would like to heat water using ¼ inch copper tubing run through cycling the water over time through the sand battery and then back to a holding tank, etc. but I don’t need the sand getting over 100C but double duty by also heating up a small room, is plate resistance heaters better than the water type heater elements both 12V?? I’m wanting to test it out but I need thermostat and thermocouple and also want to use solar panels and battery but with the thermostat I can slowly raise the temp of the sand over days, etc. so it doesn’t pull the battery down, etc. once I get it to the temp I want I reckon from that point forward it will require very little energy to maintain that temp.

Could this be used as a fan in the summer?

Did you happen to note how long the various sizes give off heat? I'm looking for a safe way to keep my garage above freezing. If it gives off heat for 3-4 hours this would be perfect!

This would be an interesting way to take a friend heat during an extended power outage.

There are far more efficient ways to drive the fan. A well designed stirling motor can reasonably obtain 30% efficiency, while TEG modules typically max out around 8%.

It’s a cool idea just not good for emergency use which is what I thought it was used for. Again great idea though!

Talk about his stuff. Why we need to hear

How long will it run for?? (On the example from the vid)

Progress report: So I've been using my buckets filled with sand on top of my wood burning stove but even though the stove top is getting to about 300 degrees Fahrenheit the buckets of sand never go higher than 120 degrees. I've got one of those infrared thermometer guns.

That’s great but how often do you have to reheat it

How hot must it get for fan to work ? ANYONE ???

So, you just need a source to heat the sand to a high degree, a heat (induction) powered fan, a bucket of sand, and you're set because of how slowly the sand dissipates heat? Huh. Pretty clever engineering.

If you really wanted to be clever, you could combine this system with solar panels and computers (which generate plenty of heat), and loop that into this system somehow as well, but you'll then need actual cooling for the computers.

Pretty clever stuff, and TEG chip is a rather amazing bit of technology.

So, I got my metal buckets and my sand but these buckets came with metal lids that I could hammer down on top of them.
I'm thinking that will help hold the heat in the sand for longer after I heat them up on my wood burning stove.
What do you think about that?

Of course we can use sand batteries just as we could any other thermal store. But the suggestions here add complexity. The good point of thermal mass is, or should be, that you can use it in simple ways. Put some bricks next to your wood stove, for example. Have an exhaust pipe for your rocket stove that goes through a bench made of cob. Those kinds of solutions that don't have any extra moving parts and don't require you to haul heavy containers of sand around. Those are the practical ideas.

I put big rocks on my woodstove like the old days LoL

But how are you heating the sand first?
How long does it last?

Post pictures

Which of the fans seem to preform the best? Any links would be greatly appreciated.

Every day is a schoolday! Fascinating.

How are you heating the sand?

Why call it a sandbattery it doesn't generate electricity

If you want a thermal mass to warm a greenhouse at night, is sand better than water? Is there a way to maximize warming that thermal mass - like having pipes through it? Thanks in advance, and thanks for your channel and sharing!

Love the channel!

quite a random comment, but In regards to your speaking voice, you sound EXACTLY like Paul Stamets

Maybe take your copper flashing and fold it flat and even 1 inch down from top of sand layer and then set your cast iron fan on top of copper and cover back the 1 inch of sand?

Except that cooling wouldn’t work as the fan operates on heat it absorbs from a source. No heat no fan no cooling.

12v heating coil w safety shut off. And a solar panel

I will experiment with combining the fan with a "shortening candle" sand heater. Best of both worlds.

Is there anything like this to create electricity great job but don't want to waist the motion.

If you add ground copper to the sand mixture at different ratios would that change the performance of the battery? i.e. Heat induction, retention, etc.

How do you move the hot containers after you've heated them?

If there was no electricity needed how did the electric stove heat the sand? SMH.

AAAUUU you know the energy you put heating its is what you get out.. it did not generate you just stored the cost over

I don't understand these sand battery vids........ how does the sand get hot in the first place? If it requires being heated, whats the point in an emergency?

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